MisterSandals
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  • Hey I got a question u seem like u know your stuff... I'm installing 2 390w solar panels (I also want a quick connect to add a 3rd mobile panel if needed) connected to a 24v all in one unit to a 24v 2.4kw 100ah 8s battery bank...I'm not sure about fuses between the units as far as amps go which and how and where to put them
    MisterSandals
    MisterSandals
    Fuses between the "units"? Do you mean between the 2 mounted panels and the 3rd carryout panel?
    Can you provide a little info about your 2 panels (series or parallel)? What SCC do you have?
    The 390w panels will be pretty high amps so connecting a 3rd (identical?) panel will need to be compatible with wiring (all unknown to me) and the SCC input voltage limits.
    I got a quick question. I want redundancy over loss. In Schematic 1 is version 1 or 2 better for pwm? I would love to use pwm because i can buy a lot of backup pwms for cheap problem is getting enough volts/amps with the least loss.
    A
    Abell
    The shunts in all schematics may be wrong. The battery switcher in schematic #4 may be wrong. I like diagram one because if a pwm controller goes bad it will only take out 1/5 of the system. Or would there be a cascade failure affection other components?
    MisterSandals
    MisterSandals
    The short answer is that i am not an expert in regards to which is “better”.
    The multiple pwm scheme looks like a single failure is isolated.

    But with as large as your system is drawn up, i think the efficiencies of larger mppt SCC’s will produce a lot more power. A lot fewer pieces to mess with too.

    Throw it out to the group for feedback.
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